1-800-533-7533
HI-E DRY 100
Installation, Operation and Maintenance Instructions
9
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Unit removes some water but not as much as expected.
1. Air temperature and/or humidity have dropped.
2. Humidity meter and/or thermometer used are out of calibration.
3. Unit has entered defrost cycle (Sec. 3.3 & 5.10).
4. Air filter dirty (Sec. 4.1).
5. Defrost timer incorrectly set for conditions (Sec. 3.3 & 5.10).
6. Defective defrost thermostat (Sec. 5.10).
7. Low refrigerant charge (Sec. 5.4).
8. Air leak such as loose cover.
9. Defective compressor (Sec. 5.6).
10. Restrictive ducting (Sec. 2.4).
Pump does not pump water.
1. Hose kinked or plugged.
2. Pump check valve plugged (Sec. 5.11).
3. Bad connection in pump circuit (Fig. 4).
4. Hose disconnected internally.
Evaporator coil frosted continuously, low dehumidifying capacity.
1. Defrost thermostat loose or defective (Sec. 3.3 & 5.10).
2. Low refrigerant charge (Sec. 5.4).
3. Dirty air filters or airflow restricted. (Sec. 4.1).
4. Defrost timer set incorrectly (Sec. 3.3).
5.4 Refrigerant Charging
If the refrigerant charge is lost due to service or a leak, a new charge must be accurately weighed in. If any of
the old charge is left in the system, it must be removed before weighing in the new charge. Refer to the unit
nameplate for the correct charge weight and refrigerant type. Add the refrigerant through the low side service
port (See Fig. 5).
5.5 Blower Replacement
The centrifugal blower has a PSC motor and internal thermal overload protection. If defective, the complete
assembly must be replaced.
1. Unplug the power cord.
2. If an outlet duct is connected to the unit, remove it.
3. Remove the cabinet side.
4. Remove the 4 screws holding the electrical box located next to the blower.
5. Disconnect the blower leads. Black from the blower switch, and white the run capacitor.
6. Unbolt the blower capacitor from the blower motor (required for removal clearance).
7. Remove the nuts & bolts holding the blower outlet flange to the cabinet end and remove the blower.
8. Reassembling with the new blower is the above procedure reversed.
